Clearly, text truncation with no means to visualize it is more serious than simply requiring that the user scroll the viewing area.
很明显，无法显示文本的文本截断比只要求用户滚动查看区域严重得多。
But if you draw your own graphics and text, the appropriate system metrics must be queried in order to avoid arbitrary text truncation.
但如果您绘制自己的图形或文本，则为了避免随意的文本截断，必须查询适当的系统度量。
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